Title :
Time domain reflectometry liquid level sensors
Author :
Nemarich, Christopher P.
fDate :
12/1/2001 12:00:00 AM
Abstract :
The technique of time domain reflectometry (TDR) has been used by electrical engineers for testing the characteristics of transmission lines and diagnosing faults. Although TDR instruments for testing cable are commonly used today, few instrumentation engineers are aware that the technique can measure liquid levels and fluid interfaces. In this article, I review the theory and principles of time domain reflectometry and present the application of this technology as a liquid level sensor
Keywords :
electric sensing devices; level measurement; microwave reflectometry; process monitoring; time-domain reflectometry; coaxial networks; fluid interfaces; level probe; liquid level sensor; multiple levels; pulse propagation velocity; pulse sampling technique; safe operation; time domain reflectometry; uniform transmission line; Capacitance; Circuits; Coaxial cables; Coaxial components; Impedance; Inductance; Level control; Reflection; Reflectometry; Voltage;
Journal_Title :
Instrumentation & Measurement Magazine, IEEE
DOI :
10.1109/5289.975464
